Compressor



IA. 0. CARPENTER.

COMPRESSOR.

APPLICATION FILED JAN. 6. 192i.

Patented Oct. 11, 1921.-

2 SHEETS-SHEET l.

INVENTOR A. 0. CARPENTER.

Patented oet; 11,1921.-

2 SHEETS-SHEET 2. K

WENTOR h4' ATT RNY f UNITED STATESy ParriN'rV ol-Flcr:. r

ALLAN O. CARPENTER, OF CORNING, NEW YORK, ASSIGNOR TO INGEBSOLL-RANDCOMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW l'lltSEY.

COMPRESSOR.

Specication' of Letters Patent.

Patented oet. -11, '1921.

Application led January 6, 1921. Serial No. 435,479.

accompanied by drawings. 1

This invention relates to vertical multi-v stage compressors, but moreparticularly' to an improved unitary cylinder constructlon 1n the formof duplex differential cylinders adapted for high pressures.

yjacket casing forms an integral The objects of the invention areprimarily to conserve space without reduction of power or loss ofefficiency and enable the compressor to be used for instance, as aDiesel engine starter for marine workand for other purposes in which ahigh pressure .compressor is particularly necessary or desirable, butthe space permissible for the compressor is limited.

In carrying out-my invention, I have produced a unitary block cylinderconstruction in which duplex high pressure differential cyllnders arecast or constructedv in block form in one piece, the low pressurecylinder bores of larger diameter being located side by side andconsequently having a cylinder wall partly in common. The cylinders arepreferably water jacketed, and the water art of the unitary cylinderconstruction. uitable valve controlled inlet and discharge chambers areprovided for the high and low pressure cylinderV bores and the wholeconstruction including the inter-cooler and driving mechanism isdesigned as compactly as possible compatible with eiicient results.

Further objects of the invention will hereinafter appear and to all ofthese ends the invention consists of the apparatus shown in one of itspreferred forms in the accompanying drawings in Which- Figure 1 is alongitudinal sectional elevation of a compressor embodying the'inventiontaken on the line 1-1 of Fig. 3 lookin the direction of the arrows.

i 2 is an'enlar ed detail transverse sectiona plan view ta en on theline 2-2 of Fig. 1 'through the coveror head for the hi hvpressurecylinder portions and ig. 3 is an end, elevation -of the comresso'rpartly in transverse vertical section ooking at the left hand end ofthemachine as illustrated in F ig. 1.

Referrin to the drawings, the machine is rovided'wlth a suitable base Aupon which 1s mounted the compressor frame B having the crank shaftbearings C for the crank shaft D adapted to be driven byl any suitablemotor E. The bearings are preferably provided with the usual Sleeves Fand main bearing caps G of any suitable construction.

In this instance the unitary cylinder construction comprises two duplexhigh pressure differential cylinders H and J con-` structed in blockform in one piece, although I am not to be understood as limiting theinvention to two cylinders: The 10W pressure cylinder bores K and L oflarger diameter are located side b side and have a cylinder dividingwall partly in common. The high pressure cylinder portions P and Q- ofsmaller diameter are shown in this instance connected to the lowpressure portions K and D as by means of the inclined walls R and S,which permits a convenient construction of valve chambers and. valvesfor thelow pressure 'cylinder' ortions.

The differential cylinders vided with an outer integral casing Tpreferably conforming substantially to the contour of the cylinders inorder to reduce space, and this outer casing forms a water jacket forthe cylinders. The water jacket includes the space U between the casingof the cylindersand the space V between the high pressurecylinderportions. The water jacket is preferably closed at the bottom Wbut open at the top at the points X, Y and Z. The block cylinder ismounted as shown on the compressor frame B and a removable cover a formsa head for the upper ends of the high pressure cylinder p prt'ions P andQ. The differential cylinders and J are provided with the differentialpistons b and c necting rods d and e to the crank D.

4suitably connected as by means of the con- An inlet chamber f havingthe inlet g is i covers k and studs o.

A discharge chamber p for the low pressure cylinder portions issimilarly located in the Walls of the casing and cylinders and separatedfrom the Water jacket space by means of the partitions g and It. Thisdischarge chamber p is common to the low pressure cylinder portions andsuitable discharre valves q. are held in position as by means of thecovers l@ and studs o. The discharge chamber p communicates by means ofthe pipe r With the inter-cooler s mounted on the frame of the machine,which inter-cooler is in turn connected by the pipe t 'to the inlet for'the high pressure cylinder portions.

rlhe cover a forming the head for the cylinders is provided With theinlet u to which the pipe t is connected and the outlet a to which thedischarge pipe w is connected.

Within the head (t is formed the inlet chamvare seated on the valveseats 6 and suitable discharge valves 7 are seated on the seats 8.rllhese inlet and discharge valves are held in position by the usualcovers 9 and studs 10. rIhe central space 11 in the cover a and the endspaces 12 in said' cover communicate with the Water jacket space for thecylinders and the cover is also provided With the bolt holes 13 forremovably securing the cover to the cylinders.

The compressor frame may be closed at one end by the cover 14 and a cam15 on the crank shaft is adapted to operate an oil pump 16, furtherdetails of which Will not be described as the oil pump forms no partotthis invention. In a machine of the type described, the Hy Wheel 17suitably carried by the flange 18 of the crank shaft, is weighted on oneside, as at the point 19, for the purpose of counteracting the tendencyof the machine to set up vibrations vertically and horizontally. Thecounter-Weighted fly Wheel throws out the static balance but producesrunning balance.

A compressor constructed in accordance Wlth this invention is strong andcompact, occuples a minimum of space "and has been found to operatesatisfactorily and Well, in comparatively smaller sizes compressing topressures from about 350 pounds to about 500 pounds per square inch, butI am not to be understood as limiting theinvention to this range-'ofpressures.

Obviously those skilled in the art will be able to devise equivalentconstructions Within the scope of the appended claims but I am not to beunderstood as limiting the invention to details of construction other y05 than those claimed herein. I Y

l claim:

1. lin a vertical multi-stage compressor, the herein described unitarycylinder construction comprising duplex differential cylindersconstructed in block form in one piece, the loW pressure cylinder boresof larger diameter being arranged side by side andlhaving a cylinderWall partly in common, the high pressure cylinder portions of smallerdiameter being connected' to the 10W pressure portions by inclinedWalls, the said diierential cylinders being provided With an integralouter casing conforming substantially to their contour and forming aWater jacket for the cylinders, common inlet and common dischargechambers for the 10W pressure cylinder portions located at the saidinclined connecting Walls, and a removable head forming a closure forthe high pressure cylinder ends and having common inlet and commondischarge chambers for the high pressure portions of the cylinders.

2. A vertical multi-stage compressor comprising a frame forming a crankcasing havirg crank shaft bearings, a crank shaft mounted in saidbearings, duplex diferential cylinders constructed in block form in oneunitary piece and mounted vertically on said frame, the loW pressurecylinder bores of said cylinder of larger diameter having a dividingWall partly in common and the said differential cylinders being inclosedby an outer casing formed integrally With the cylinders, the spacebetween the outer casing and the cylinders forming a Water jacketincluding the space between the smaller high pressure portions of thecylinders, said jacket being closed at the bottom but open at the upperend, inlet and discharge valves for the lovvv pressure portions of thecylinders, a removable head forming a closure for the high pressurecylinder ends and having inlet and discharge valves for the highpressure portions of the cylinders, differential ,pistons in said duplexcylinders operatively connected to said crank shaft, and an inter-coolermounted on the compressor frame and connected to the discharge of thelow pressure cylinder portions and to the inlet of the high ypressurecylinderportions. Y

3. A vertical multi-stage compressor comprising a frame forming a crankcasing having crank shaft bearings, a crank shaft mounted'longitudinally in said bearings, duplex `high pressure diierentialcylindersconstructed in block form in one unitary piece and mountedvertically on said frame, the loW pressure cylinder bores of largerdiameter being arranged side by side and having a cylinder Wall artly incommon, the high pressure cylinder portions of smaller diameter beingconnected to the low pressure portions by inclined walls, the saiddiiierential cylinders being provided With an integral outer casingconforming substantially to their contour andl forming a Water jacketfor the cylinders, common inlet and common discharge chambers for thelow pressure cylinder portions located at the said inclined'connectingWalls, inlet and discharge Valves in said chambers, a removable headforming a closure for the high pressure cylinder ends and having common.inlet and common discharge chambers for the high pressure portions ofthe cylinders,

inlet and discharge valves in said chambers,

diferential pistons in said duplex cylinders operatively connected t0said crank shaft, and an inter-cooler mounted on said frame andconnected to the common discharge chamber of the low pressure cylinderportions and to the common inlet chamber of the high pressure cylinderportions.

In testimony whereof I have signed this specification. y

ALLAN O. CARPENTER.

